Presentation on theme: "Chapter 13: Natural Resources"— Presentation transcript:
1Chapter 13: Natural Resources 13.1 Natural resources support human activity13.2 Minerals and rocks are nonrenewable resources13.3 Resources can be conserved and recycled13.4 Resources can be converted to useful forms
2Warm-up True/False Minerals can form when molten rock cools. True Minerals form within Earth but not on Earth’s surface.Minerals form both within Earth and on its surface.Ores are the rarest and most expensive of the known minerals.Ores are rocks that contain enough of a mineral to be mined for profit.
3The television or computer is probably used the most, but much of the time, they are left on when no one is watching or using them. Turning off appliances when they aren’t in use will conserve energy.
4Conservation involves reducing waste and reusing natural resources 1960s: each person in the United States produced 1.2 kilograms (2.7 lb) of trash a dayToday: that has more than doubled!Add it up: the nation’s households produce about 236 million tons of trash each year!Over ½ is buried in landfills
5Conservation reducing and reusing! Conservation – protecting, restoring, and managing natural resources so that they last as long as possibleCan be used to extend natural resources, to protect human health, and to slow the growing mountain of trashCan reduce the amount of pollution released into the air, water, and soilreducing and reusing!
6Reduce Reduce waste at the source: a local store or your own home; Examples:When choosing between two similar products, choose the one with less packagingPackaging is a major source of paper and plastic wasteWhen brushing your teeth or washing your face, turn the water off until you are ready to rinsecan save 8 to 23 liters (2 to 6 gal.) of water a day, or 2920 to 8395 liters (730 to gal.) per yearWhen eating, at home, school, or out: use only the napkins and ketchup and mustard packets that you really needUse energy-efficient light bulbs if you can!Turn off lights and appliances when you are not using them!
7Reuse Conserves materials and resources Do: Refill plastic water bottles instead of buying new bottles** be sure to reuse the “right” kind!! (Not your #1 plastic in your lunch!)Donate old clothes and other items instead of throwing them awayRinse and reuse plastic sandwich and storage bagsCut the top off a half-gallon container to make a watering can
8How much more paper is thrown away than plastics? about five times moreHow much waste would be reduced if all food scraps and yard trimmings were composted?Food (7.4%) yard trimmings (17.6%) = 25%
9Braun cruZer razor: package that is 65% smaller and uses 66% less PET plastic - allowed for 167% more units to be shipped per pallet. This change alone will result in saving of an estimated 480,000 litres of fuel in shipping & handling, representing 1,270 tons of CO2 emissions.The Sony Vaio W Series Eco Edition laptop not only has a case made from 20% recycled CD plastic material, it ships in a stylish carry case rather than a disposable cardboard box.Panosonic: In 2009 they moved from plastic packs on all SD memory Card models, to 2-ply sealed paper Eco packs, reducing PET plastic used by 90%.
10What are some ways that you can reduce waste and reuse natural resources? Turn off the water when brushing your teeth, and donate old clothes instead of throwing them away.
11Recycling involves recovering and extending natural resources Recycling – involves recovering materials that people usually throw awayRecycling one aluminum can saves enough energy to run your tv for three hoursglass, aluminum cans, certain plastics, paper, scrap iron, and such metals as gold, copper, and silver
12Recycling StatisticsRecycling 90% of the US’s Sunday newspapers (one day) saves save 500,000 trees = entire forestRecycling one glass bottle: energy saved will light a 100-watt bulb for four hoursRecycling five 2-liter plastic bottles saves enough plastic fiber to fill a ski jacketRecycling 36 bottles makes enough fiber for a square yard of synthetic carpetIt takes less energy to make products from recycled materials than to make new products
13Recycling Not every item can be recycled or reused Not every item can be recycled or reusedEven some types of plastic and glass items cannot be recycledRemaining trash ends up in landfills!Avoid items that cannot be recycledLimitationsIt takes time, energy, and money to collect waste materials, sort them, remove what can be used, and form new objectsEven still…helps extend available resources and protect human health and the environmentWhat are some of the benefits and drawbacks of recycling?benefits: less fossil fuels burned, fewer resources useddrawbacks: time, energy, money needed to recycle